have you calibrated you ph meter lately bobbert (just a thought, ive had meters swing out by loads over a month or two and wrongly adjusted ph as a result, giving me iffy leaves that looked a little like them)?

or i'd suggest plain old hunger with it being coco just by looking but with knowing nothing about your feeds or ec im not sure.

Thats a possibility , I will check later tonight.
Another thought is that I have been underwatering. I was not getting enough run off and my plants were wilting.Basically what went in stayed in, This may have caused a build up of salts and/or calcium or hot spots in the coco thus the lock out?

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